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Chapter 9 Fire Pump Theory > Chapter 9 Fire Pumps Theory > Flashcards

Chapter 9 Fire Pumps Theory Flashcards

1
Q

Except for a few well developed municipal water sytems, it is necessary to _________ the existing pressure to with fire dept pumpers to maintain pressure sufficient for fire fighting ops

A

increase

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2
Q

Static water supply includes ___,____ and ______

A

tanks, ponds or lakes

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3
Q

Early pumps in Fire service were hand operated ___________ pumps

A

piston

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4
Q

After piston pumps came _______ pumps using a hand crank to rotate a gear.

A

rotary

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5
Q

Rotary pumps were replaced by _______ and ______ action piston pumps of various diameters and strokes. These pumps are referred to as __________ displacement pumps

A

single and double

positive

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6
Q

Positive Displacement pumps are _________ priming, deliver and _____ volume of water or air, and and exhaust air from the pump and deliver ______

A

self
definite
water

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7
Q

Positive Displacement Pumps are “_________________” in that they produce the same flow at a given speed regardless of discharge pressure.

A

“Constant Flow Machines”

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8
Q

Modern fire Apps continue to have a form of positive displacement pump called a __________ that is connected to main pump to allow App to use static water supplies.

A

priming pump

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9
Q

Positive Displacement pumps are used for ___________, and priming pumps

A

hydraulic pumps on aerial devices

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10
Q

Modern fire Apps MAIN pumps are __________ pumps

A

centrifigal

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11
Q

Centrifigal pumps rely on the ________ of water to create centrifigal force

A

velocity

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12
Q

A _______ pump is a positive displacement pump that uses one or more reciprocating pistons to force water from the pump chamber

A

Piston

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13
Q

Piston pumps are no longer used as high capicity pumps, some are still in service for ______ pressure streams. These multi cylinder PTO driven pumps can provide pressures of ________psi

A

high
1,000 psi

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14
Q

Rotary pump is a ______ capacity pump used for ______ type pumps

A

small
booster

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15
Q

Rotary pumps are: ____, _____ and _____ pumps

A

low volume, high pressure and priming

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16
Q

Rotary type pumps are either:
1.
2.

A

rotary gear or rotary vein

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17
Q

Rotary pumps are driven by either:
1.
2.

A

small electric motor
clutch off drive shaft

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18
Q

the ____ gears on a rotary pump contact each other and the casing forming ______ and _______ tight pockets

A

two
air and water

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19
Q

The ammount of water that can be pumped by a rotary gear pump depends on the size of the ______ in the gears and the _______ of rotation

A

pockets
speed

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20
Q

If a positive displacement pump tries to move more water than the discharge line can handle, ______ builds

A

pressure

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21
Q

a _______ valve must be in place to handle excess pressure on a positive displacement pump

A
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22
Q

Positive displacment pumps are susceptable to dmage from normal _____ and ______ and pumping water laden with _______ and other debris.

A

ware and tear

sand

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23
Q

Most positive displacement pumps feature gears made of ____ or other soft metals and casing made of ________

A

bronze
cast iron

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24
Q

Rotary Vane Pumps: Has moveable elements that automatically _____ for wear.

A

compensate

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25
Q

___________ are the most common types of pumps used to prime centrifigal pumps

A

rotary vein pumps

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26
Q

on a rotary vein pump, the distance between the rotor and the housing are much ______ at the intake than at the discharge

A

greater

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27
Q

As the rotor turns, the veins are ______ against the housing by centrifigal force

A

forced

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28
Q

the veins in a rotary vein pump are worn, they _____ further and make contact making them better than rotary gear pumps at moving ______

A

slide

air

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29
Q

Rotary pump are prone to _____ if not excercised regularily. The should be operated during routine _____ checks

A

failure

apparatus

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30
Q

Nearly ALL modern Fire Apps feature a _______ pump as the main pump.

A

centrifigal

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31
Q

Centrifigal pumps are classified as __________ diplacement pumps

A

non positive

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32
Q

A centrifigal pump works by throwing water from the center to the ______ of the disk

A

outer edges

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33
Q

The faster a disk is turning on a centrifigal pump the more ______ is created

A

velocity

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34
Q

_______ is a spiral divergent CHAMBER of a centrifigal pump in which the velocity energy by impeller is converted to ________

A

Volute

pressure

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35
Q

In the volute increasing size reduces the ______ of water inabling the ________ to build up

A

velocity

pressure

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36
Q

discharge volume on a centrifigal pump affects both the ______ and ______ pressures

A

intake and discharge

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37
Q

Increasing speed is roughly equal to the ______ of the change in impeller speed.
doubling impeller speed means _____ times the water

A

square

4

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38
Q

any movement of the impeller increases both ______ and ________ buildup of water in the volute.

A

velocity and corresponding pressure.

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39
Q

Three ways to prime a centrifugal pump include rotary vein and a device the uses the braking system to power a ______ device that removes air. And finally a ______ valve on the suction hose ________

A

venturi

foot valve

strainer

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40
Q

two types of centrifugal pumps. _______ stage and ______ staged

A

single
multi

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41
Q

Single stage centrifugal pumps generally have flow capacities of up to _________ gpm

A

2,250

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42
Q

Newtons third law of physics is that for every…….

A

action there is an equal and opposite reaction

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43
Q

A double suction impeller takes water from ________ sides. the reaction of each side being equal and opposite cancels out the _______ thrust

A

both

lateral

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44
Q

_______ edges in the opposite opposed volute discharge and divert the water into _____ streams that are ____degrees apart. this reduces stress and prolongs life of App and pump.

A

Stripping edges

two

180 degrees

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45
Q

The ________ valve changes multistage pumps from volume to ________

A

transfer

pressure

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46
Q

pumping in parallel is ________ mode

A

volume

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47
Q

pumping in series is ____ mode

A

pressure

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48
Q

in volume mode each impeller is capable of flowing ____ % of it’s rated capacity

A

50%

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49
Q

If a pump is rated for 1000gpm at 150 psi and you are pumping in volume. each impeller is pumping _____gpm for a total discharge pressure of ______psi. Note that intake pressure will ______increase this number.

A

500gpm
150psi

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50
Q

In series/pressure mode, the first impeller increases pressure _____to_____% of the volume capacity through the transfer valve

A

50-70%

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51
Q

The process of switching to volume or pressure mode is sometimes called “_____”

A

changeover

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52
Q

When a transfer valve is operated sudden changes in _____ can occur. switching to volume to pressure can _______ pressure

A

pressure

double

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53
Q

Any changeover from volume to pressure or vice versa must be carefully coordinated with attack crews so they will be _____ for a slight interuption during the transfer.

A

ready

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54
Q

If you there is question as to the correct position for the transfer valve, it is best to opperate in _______

A

parallel(volume) mode

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55
Q

In parallel the pump is capable of supplying _____% of it’s rated capacity at ____psi at ____feet of lift with _____feet of suction hose

A

100 %
150 psi
10 feet lift
20 feet suction hose

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56
Q

Many power operated transfer valves operate at pressures as high as _____psi

A

200 psi

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57
Q

power operated transfer valves may be activated by electricity, _____ pressure or ______pressure. D/O must be familiar with the ______ override features should the power equipment fail

A

air pressure
water pressure

manual override

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58
Q

Transfer valves have a safeguard making it physically impossible to accomplish transfer while pumping at ________

A

high pressure

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59
Q

Some fire trucks have been constructed with ___ impellers connected in series to develop pressures as high as ________ for high pressure fog operations

A

4

1,000gpm

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60
Q

Another method to increase pressure is a single stage used with a _____ stage pump. When pressure higher than _____psi is needed the seperate third stage pump is engaged. These pumps are usually for high rise buildings

A

two

250 psi

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61
Q

The distance between the pump casing and the hub is usually limited to _____inches

A

.01 inches.

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62
Q

A pump reaches it’s capacity at around ________RPM

A

4,000

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63
Q

_______ are attached to the impeller and pump casing to allow a small clearance to prevent wear

A

wear rings

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64
Q

It is ok to shut discharge valves with a centrifugal pump is running. It will only start to _____ the water. Positive displacement pumps CANNOT have discharge shut while running.

A

heat

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65
Q

Newer centrifugal pumps may have a ______ relief valve to assit when pump is overheating from no recirculation of water.

A

thermal

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66
Q

The D/O can place a hand on the direct pump intake valve to check for ___

A

heat

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67
Q

At the point where the shaft passes through the pump casing, a semi-tight seal must be maintained to prevent ______. _________ seals are the most common type to prevent this

A

air leaks

mechanical

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68
Q

The most common type of seal packing is composed of ______ impregnated with _____ or ______

A

rope fibers
graphite or lead

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69
Q

seal packing is pushed into a stuffing box by a packing gland driven by a ___________

A

packing adjustment mechanism

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70
Q

Some centrifugal pumps are equipped with ______ or mechanical seals

A

ceramic

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71
Q

Packing rings are primarily used in ________fire pumps

A

older

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72
Q

In order to overcome heating where th packing ring rubs the shaft, spacers known as ______ or_______ is supplied with the packing to provide cooling

A

lantern or slinger ring

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73
Q

if packing rings are too loose and water leaks it might not be possible to ______ with the pump because it is not air tight.

A

draft

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74
Q

If pump s not used for extended periods of time, the packing may ________ causing excessive leaking

A

dry out

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75
Q

After a period of dryness to packing, adjustments to packing should be made after pump has been operated under pressure so packing can seal properly

A

no answer

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76
Q

If a pump is operated dry, damage to the ______ can occur

A

shaft

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77
Q

ceramic pumps seals are superior in that they resist to ______, ______ and corrosion.

A

warping, stretching

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78
Q

When considering buying a pump, consider:
1. use of pump
2.
3.appearance
4. space requirements
5.

A

cost
ease of maintenence

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79
Q

Pumps powered by gas or deisel engines INDEPENDENT of the vehicle-drive engine are examples of _________ pumps

A

auxiliary

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80
Q

Most common applications for auxiliary pumps are:

1.
2.
3.
4.
5.

A
  1. ARFF
  2. Wildland apps
  3. mobile water supply apps
  4. trailer mounted apps
  5. Portable fire pumps
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81
Q

Some auxiliary pumps are powered by ____ fuel for military or other special applications.

A
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82
Q

Some auxiliary pumps are mounted on a pickup with a capacity of _____gpm

A

500 gpm

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83
Q

PTO is a mechanism that allows an engine to power equipment such as a _____, ______ or _______ tool.

A

pump, winch or portable tool. it is attached to the transmission.

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84
Q

PTO pumps are most common on these applications:
1.
2.
3.

A
  1. intitial attack
  2. wildland
  3. mobile water supply applications
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85
Q

PTOs are even being widely used on __________ apparatus pumpers

A

structural

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86
Q

Rear engine PTOs are driven off the engines ________. these have had sucess in construction and refuse industries

A

flywheel

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87
Q

PTO offers pump and roll capabilities as well as a _________ wheel base and _______ room in compartments as well as ______lays that are lower on app

A

shorter

additional

crosslays

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88
Q

Pump gear case must be mounted in a location that allows for a ________ of angles in the drive shaft

A

minimum

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89
Q

The PTO is powered by an _______ in the vehicles transmission.

A
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90
Q

when a D/O _______ the clutch to stop or change gears, the pump also stops turning.

A

disengages

91
Q

PTO allows ump and roll but it is not as effective as a ______ engine unit

A

seperate

92
Q

Pump and roll. pressure in pump changes as D/O increases driving ______

A

speed

93
Q

If using pump and roll, a ______ guage should be mounted in the cab.

A

pressure

94
Q

While hoselines are in use during pump and roll, use the ______ guage and not speed of vehicle as a guide.

A

pressure

95
Q

Using the ______ gear usually makes maintaining a balance between speed and pressure easiest

A

lowest

96
Q

older PTO pumps were _____gpm, now some with full torque power take-offs that allow for ______gpm

A

500
1,250

97
Q

horse power requirements for app must include accessories such as ________, ______ and vehicles ________

A

warning lights
air compressor
air conditioning

98
Q

Front mount pumps are typically driven through a gear box and a clutch connected to a _____ to the front of the __________

A

drive shaft

crankshaft

99
Q

on a front mounted pump, the ______ box has a step up gear ratio which causes the impeller of the pump to turn _____ than the engine.

A

gear

faster

100
Q

typically a front mounted pump is rated at _______gpm

A

1,250 gpm

101
Q

on front monted pump, the drive shaft must ALWAYS be matched to the _________ source

A

power

102
Q

one disadvantage to front mounted pump is the possibility of the pump and gauges ________ in cold weather.this can be lessoned by the use of expernal lines that ciculate ______ fluid through the pump body.

A

freezing

radiator

103
Q

During warm weather, front mounted pumps may restrict _______ to the engine.

A

air flow

104
Q

Front mounted pumps are operate at the pump location. this is dangerous and a _____ must be provided to prevent the transmission from engaging.

A

lock

105
Q

There should be a ______ light in the cab that flashes when front mounted pump is engaged.

A

warning

106
Q

a front mounted pump may be _______ if driven while pump is running or with no ____ in pump.

A

damaged

water

107
Q

a pump mounted laterally across the frame behind the engine and transmission is a ________ pump

A

Midship pump.

108
Q

Power to a midship pump is supplied to the pump through the use of a split shaft gear case (transfer case) located in the ______ line between the transmission and the _____axle.

A

drive

rear

109
Q

on a midship pump power can be diverted from the _______ and transmitted to the pump.

A

rear axle

110
Q

midship pumps are driven by either a series of ______ or a ______chain or _______

A

gears

drive chain

111
Q

on a midship pump, the impeller spins _____ or _____ times faster than the engine.

A

1 1/2 - 2 1/2

112
Q

with the engine idling and the pump engaged, most speedometers will read _____ to _____mph. Some speedometers may read _____mph including PTO pumps with pumps engaged

A

10-15 mph

0mph

113
Q

most Apps have a light on in the cab to show when the pump is ______

A

engaged

114
Q

A D/O should not rely solely on the pump light. Other indications include
1.
2.

A

speedometer
hearing it engage

115
Q

on automatic transmissions, it is possible for the ______ to be momentarily be engaged

A

transmission

116
Q

If trying to go into pump and the gear shifter is shifted our of nuetral before being in pump, the engine may _____

A

stall

117
Q

_________ pumps are used for asuliliary systesm including CAFS and gerators on Apps.

A

hydrostatic

118
Q

Apps with rear mount pumps are becoming _________. These provide a more even weight on the _______ and offer more _______ space.

A

increasingly popular
chassis
compartment

119
Q

a negative to rear mount pumps is that the D/O is exposed to _______. This can be alleaviated by placing the pump at one ________side

A

traffic

rear

120
Q

Depneding on manufacturer, rear mount pumps may be powered by either a _______ or _______

A

split shaft tranny or a PTO

121
Q

The primary piping system on a pump are :
1.
2.
3.
4.

A

intake
discharge
pump drains
pump valves

122
Q

NFPA 1901 required all piping to be ______ resistant

A

corossion

123
Q

Most pump piping is made of ____, ______, ________ or __________ and some rubber hoses

A

cast iron, brass, stainless steel or galvanized steel

124
Q

piping system of fire pump much be capable of withstanding hydrostatic tests of _____psi before going in service

A

500 psi

125
Q

in order to minimize friction loss, all APP piping and hoses must be designed to run as _____ as possible with minimum number of ______.

A

straight

bends

126
Q

Water may enter the pump from either the ______ or ________

A

tank or external water supply

127
Q

Accoring to NFPA 1901, pumpers with capacity 500gpm or less should have piping capable of flowing ______gpm. Those with capacity greater than 500gpm should be able to flow at least ______gpm

A

500 gpm
500 gpm

128
Q

Many tank to pump piping is ____ inches in diameter

A

4 inches

129
Q

moblie water supply units may feature ______ tank to pump lines

A

multiple

130
Q

a leak in the tank to pump valve will not allow the pump to be _____ if the tank is empty.

A

primed

131
Q

A ________ is tapped into the pump at a high point on the suction side or the impeller eye and use a priming valve. because of this, all intake lines in a centrifugal pump are normally ______ the eye of the impeller.

A

primer

below

132
Q

A minimum of ___inch piping, valves and elbows must be used to supply 1.5, 13/4 and 2 inch handlines

A

2 inch

133
Q

A pump with a 750gpm capacity must have at least _________ discharges. Pump less than 750gpm capacity need only one ______

A

two 2 1/2 inch discharges

2 1/2 inch discharge

134
Q

discharges are usually equipped with a locking _________

A

ball valve

135
Q

all valves should be designed and maintained so they are easily operated at preassures of up to ______psi

A

250

136
Q

A tank fill line or tank recirculating valve allows to replenish the water tank when hooked up to an external ______

A

source

137
Q

Apps with a water tank less than 1,000 gallons must have a fill line of at least ______inches in diameter

A

one inch

138
Q

Tanks greater than 1000 gallons must have a fill line at least _____ inches in diameter

A

two inches

139
Q

on a two stage pump, the fill line coming of the first stage may lead to ________ in the second stage

A

overheating

140
Q

Some pumps have a booster line cooling valve or a ___________

A

bypass valve

141
Q

An engine cooler circulates tank water through a heat exchanger to aid in ___________

A

cooling the engine

142
Q

Valve life might be extended by _____ the pump of debris

A

flushing

143
Q

most common type of valve is a ____ valve that permits the full flow of water through a line with minimul friction loss

A

ball

144
Q

The most common two types of actuators for ball valves are
1.
2.

A

push/pull handles (t handles)
Quarter turn handles

145
Q

A push pull valve usually has a flat handle that can be locked by turning it _____degrees

A

90 degrees

146
Q

Quarter turn valve is open or closed by a _____degree movement of the handle

A

90

147
Q

D/O must make sure intake valves are fully _____ or ______ by visual indicator on the pump panel

A

open or closed

148
Q

______ or ______ valves are commonly used on large diameter intake and discharges

A

Gate or butterfly

149
Q

Gate valves are opened by a _______ while butterfly valves operated by a _______

A

handwheel
quarter turn handle

150
Q

NFPA 1901 requires that all intake or discharges are ____ inches or greater be equipped with slow acting valves.

A

3 inches

151
Q

most pump connections are equipped with _____ valves on the line side of the control valve.

A

drain

152
Q

after all air is removed through the bleeder valve it can be closed and the intake valve can be opened.

A
153
Q

Drains must be supplied or located at the ______ point on the pump.

A

lowest

154
Q

if master drain is opened up pressure or when vacuum is present the __ ring may be dmaged

A

O ring used as gasket for air tight

155
Q

close all drains immediately after _____. Failing to will prevent successful drafting in future.

A

draining

156
Q

A booster line may have to be _____ to drain properly. Some boosters are hooked up to the Apps _______ to blows it out.

A

pulled

air brakes

157
Q

NFPA 1901 requires each app pumping system to have some type of ______ control device. It must operate in ____to_____ seconds after pressure rises and restricts the pressure from rising ___ psi above the set level

A

pressure

3-10 seconds

30 psi

158
Q

the must be a _______ light in color to indicate that a pump has activated a reief valve to control pressure.

A

yellow

159
Q

There are two basic concepts to pressure relief valves:

Those that relieve excess pressure on the _______ of the pump. And those that relieve pressure on the ______ side of the pump

A

discharge

intake

160
Q

the most common form of a pressure relief valve is a ________

A

spring pilot valve

161
Q

When pressure is too great the spring compresses sending water back into the ______

A

PUMP INTAKE

162
Q

As hydraulic force is less than the force on the spring, the pilot valve will _______

A

stay closed

163
Q

When the pump discharge pressure rises higher than allowed by the pilot valve setting, the ________ in the pilot valve ______

A

spring compresses

164
Q

When the spring on the pilot valve compressed, the action allows the _______ valve to move to the ______ causing water to dump back into the _________

A

needle
left
pump intake

165
Q

When the spring in the pilot valve stays closed and is not compressed, water stays in the main chamber and the main valve stays ______

A

closed

166
Q

When the hydraulic force on the small end of the main valve is now greater than behind the main valve, the result is that the main valve ____ and permits part of the water to return to the ______side reducing ________pressure

A

opens
intake
discharge

167
Q

A discharge pressure relief valve when activated takes pressure/water from the discharge side and dumps it back into the ______side

A

intake

168
Q

Intake pressure relief valves are intended to protect pumps and hose from ____________

A

water hammer

169
Q

Discharge pressure relief valves are ______ to react but are _______ to reset

A

quick
slower

170
Q

Two basic type if intake relief valves:
1. one that is supplied by the manufacturer and is part of the pump manifold
2.

A
  1. is an add on device screwed onto the pump intake section
171
Q

it is generally recommended that intake relief valves be set at ____psi above necessary operating pressure.

A

10 psi

172
Q

most screw on intake valves are equipped with ____ that allow water supply to be stopped if preferred.

A

manual shutoff valves

173
Q

you will also find ______ attached to intake pressure relief valves to remove excess air in LDH.

A

bleeder valve

174
Q

________ is a pressure control device that controls the engine speed eliminating hazards from excess pressure.

A

pressure governor

175
Q

Pressure in a pump can be controlled by one of two governors:
1.
2.

A

mechanical
electrical

176
Q

A pressure governor works by controlling______

A

the engine speed by reducing it

177
Q

Excess pressure is usually the result of ________

A

a hand line being shut down.

178
Q

When excess pressure is built up, a tube in the discharge side of the pump tranmits the resulting pressure to a ________ device

A

governing

179
Q

A pressure governor may be used in conjunction with the ______ control

A

throttle

180
Q

Pressure governors: When drafting water returns to the _______ side of the pump. When pumping from a hydrant the water is discharged on the ______

A

intake
ground

181
Q

Newer pumps are often equipped with ______ governors

A

electronic

182
Q

electronic governors have pressure sensing elements that attach to the _______

A

discharge manifiold

183
Q

an electronic governor controls pressure by adjusting the throttle by adjusting the amont of _____ supplied to the engine.

A

fuel

184
Q

A pressure governor will control any pressure set above the set pressure and return the engine to ______ when it drops below that point.

A

idle

185
Q

eletronic governors have a _______ feature that returns engine to idle if intake pressure drops below _____psi

A

cavitation
30 psi

186
Q

pressure governors are _____ to respond and eliminate the need for a discharge _______ valve

A

quick
pressure relief

187
Q

Another advantage to a electronic governor is that a when a discharge line is closed the engine RPM is adjusted, but the same ______ pressure is maintained on any lines still flowing. A mechanical governor would result in lower discharge pressure to _____ lines

A

discharge

all

188
Q

D/Os must be familiar with different cut in/_______ ranges. If discharge pressure is reduced for a specific period of time, the governor will return to ______

A

cut out

idle

189
Q

The ability to sucessfully draft is the ability to create a _____ pressure within the pump and intake hose than exist in the atmosphere.

A

lower

190
Q

There are 4 types of primers:
1. positive displacement
2.
3.
4.

A
  1. Positve displacement
  2. exhaust
  3. vacuum
  4. air primers
191
Q

most moern pumps use ______ primers

A

positive displacement primers

192
Q

rotary vein primers are often powered by an _______ motor. this allows them to be operated regardless of engine speed.

A

electrical

193
Q

primer oil helps to fill voids in gaps and fill iregularities in the housing.

A
194
Q

Because the oil resivor on a priming pump is often pounted higher, than the pump itself, a vent hole is provided to break the _____ action as the tank drains

A

siphon

195
Q

The general range for priming is _______ to _____ rpm

A

1000-1250 rpm

196
Q

Most new Apps are slso equipped with _____less primers.

A

oil

197
Q

exhaust primers are found on _______mounted pumps or _____ apps.

A

skid mounted pumps or older app

198
Q

Exhaust primers use the same concept as a ____ eductor

A

foam

199
Q

A vacuum primer is a simple device that makes use of the vacuuum already present in the ______ manifold or any gasoline driven engine

A

intake manifold

200
Q

A vacuum primer works best near _____speed or _____ rpms

A

idle
low

201
Q

Air primers use the ______ effect to create prime and has no moving parts or lubrications

A

venturi

202
Q

A transmission temp gauge is also recommended for installation on the pump panel to monitor and ensure there is no damage to the ______

A

Tranny

203
Q

The master _____ and ____ gauges are the two primary gauges used by the D/O to determine water pressure entering and leaving the pump.

A

master intake master discharge

204
Q

The master intake gauge measures positive pressure or _______

A

vacuum under 0 on the gauge

205
Q

The master intake valve is calibrated to ____to____psi of positive pressure and from ____to____ inches of mercury (vacuum) on the negative side.

A

0-600psi positive
0-30 inches

206
Q

When a vacuum reading approaches ____inches the pump is nearing its capacity and is not able to supply additional lines.

A

20 inches

207
Q

The tachometer displays engine speed in ________

A

RPM

208
Q

The pumping engine coolant temperature indicator displays the temp of the _____ in the engine that powers the fire pump.

A

coolant

209
Q

Pumping engine oil pressure indicator shows if adequate supply of oil is being delivered to the critical areas of the _____ during pumping.

A

engine

210
Q

Pump overheat indicator is a audible or ______ indicator that warns D/O of an overheated pump.

A

visual

211
Q

Voltmeter is a device used for measuring ______ voltage in an electrical system. Voltmeter also gives indication of the _____ condition.

A

existing

battery

212
Q

Ammeter is a gauge that indicates both the ammount of electrical current being drawn from and provided to the vehicle’s _______
It also indicate the status of the vehicles alternator and charging system.

A

battery

213
Q

Pump pressure indicators commonly called ______ may be connected to individual discharge outlets of the fire pump. the gauge must be on the outlet side of the ______ valve

A

discharge gauges

discharge

214
Q

The engine throttle at the pump panel allow for increase or decrease of the engine speed which allow to D/O to control the amount of _____ that the pump supplies the discharge

A

pressure

215
Q

an engine throttle knob is also called a _______

A

vernier

216
Q

Primer controls on pump panel are usually _______, _______ or _____ lever

A

push button, toggle switch or pull lever

217
Q

D/O should confirm the accuracy of a water display indicator light by inspecting the ______ opening to verify the tank is full.

A

fill

218
Q

The primary function of an auxiliary cooling system is to control the temp of the ______ in the apparatus engine during pumping operations

A

coolant

219
Q

Older apps have one of two different coolers: either the ______ or the _______

A

marine
or Immersion type

220
Q

The marine cooler has a number of small _____. the cooler water from the pump contacts these tubes and cools the coolant inside them.

A

tubes

221
Q

The immersion cooler the tubes or coils for the pump water are immersed in a container of coolant.

A
222
Q

both types of auxiliary coolers are designed so coolant does ____ mix with the water.

A

NOT

223
Q

Older Apps have a radiator fill valve that allows water from the pump to circulate in the radiator. This is an emergency use system only.

A
224
Q

And finally, in extreme situations where an engine needs to be cooled while supplying hoselines, a ____ stream can be directed at the engine to maintain some cooling while interior crews withdraw.

A

water

Chapter 9 Fire Pump Theory (1 decks)

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